Seems like your mod has some discomforts with Material filter

MaterialFilter.ThingFilterUI_DoThingFilterConfigWindow_Patch:addHiddenFilters(IEnumerable`1& forceHiddenFilters)
at CaravanItemSelectionEnhanced.Dialog_TabSettings.DoWindowContents (UnityEngine.Rect wrect) [0x0026d] in <8e4a97c7318641299c2e1cfb0556f319>:0
at Verse.Window.InnerWindowOnGUI (System.Int32 x) [0x001a6] in

It detects a void function and that's why it refuses to display anything in the category tabs.

No i will NOT remove Material filter. It's a mandatory mod.

In summary: Taken from the HugsLib thing

Mouse position stack is not empty. There were more calls to BeginScrollView than EndScrollView. Fixing.
Exception filling window for CaravanItemSelectionEnhanced.Dialog_TabSettings: System.NullReferenceException: Object reference not set to an instance of an object
[Ref F5AD647E]
at Verse.Listing_TreeThingFilter.ListCategoryChildren (Verse.TreeNode_ThingCategory node, System.Int32 openMask, Verse.Map map, UnityEngine.Rect visibleRect) [0x0000a] in <24d25868955f4df08b02c73b55f389fe>:0
at Verse.ThingFilterUI.DoThingFilterConfigWindow (UnityEngine.Rect rect, Verse.ThingFilterUI+UIState state, Verse.ThingFilter filter, Verse.ThingFilter parentFilter, System.Int32 openMask, System.Collections.Generic.IEnumerable`1[T] forceHiddenDefs, System.Collections.Generic.IEnumerable`1[T] forceHiddenFilters, System.Boolean forceHideHitPointsConfig, System.Boolean forceHideQualityConfig, System.Boolean showMentalBreakChanceRange, System.Collections.Generic.List`1[T] suppressSmallVolumeTags, Verse.Map map) [0x00325] in <24d25868955f4df08b02c73b55f389fe>:0
- PREFIX KamiKatze.MaterialFilter: Void MaterialFilter.ThingFilterUI_DoThingFilterConfigWindow_Patch:addHiddenFilters(IEnumerable`1& forceHiddenFilters)
at CaravanItemSelectionEnhanced.Dialog_TabSettings.DoWindowContents (UnityEngine.Rect wrect) [0x0026d] in <8e4a97c7318641299c2e1cfb0556f319>:0
at Verse.Window.InnerWindowOnGUI (System.Int32 x) [0x001a6] in <24d25868955f4df08b02c73b55f389fe>:0
GUI Error: You are pushing more GUIClips than you are popping. Make sure they are balanced.
Exception filling window for CaravanItemSelectionEnhanced.Dialog_TabSettings: System.NullReferenceException: Object reference not set to an instance of an object
[Ref F5AD647E]
at Verse.Listing_TreeThingFilter.ListCategoryChildren (Verse.TreeNode_ThingCategory node, System.Int32 openMask, Verse.Map map, UnityEngine.Rect visibleRect) [0x0000a] in <24d25868955f4df08b02c73b55f389fe>:0
at Verse.ThingFilterUI.DoThingFilterConfigWindow (UnityEngine.Rect rect, Verse.ThingFilterUI+UIState state, Verse.ThingFilter filter, Verse.ThingFilter parentFilter, System.Int32 openMask, System.Collections.Generic.IEnumerable`1[T] forceHiddenDefs, System.Collections.Generic.IEnumerable`1[T] forceHiddenFilters, System.Boolean forceHideHitPointsConfig, System.Boolean forceHideQualityConfig, System.Boolean showMentalBreakChanceRange, System.Collections.Generic.List`1[T] suppressSmallVolumeTags, Verse.Map map) [0x00325] in <24d25868955f4df08b02c73b55f389fe>:0
- PREFIX KamiKatze.MaterialFilter: Void MaterialFilter.ThingFilterUI_DoThingFilterConfigWindow_Patch:addHiddenFilters(IEnumerable`1& forceHiddenFilters)
at CaravanItemSelectionEnhanced.Dialog_TabSettings.DoWindowContents (UnityEngine.Rect wrect) [0x0026d] in <8e4a97c7318641299c2e1cfb0556f319>:0
at Verse.Window.InnerWindowOnGUI (System.Int32 x) [0x001a6] in <24d25868955f4df08b02c73b55f389fe>:0
GUI Error: You are pushing more GUIClips than you are popping. Make sure they are balanced.

@Rovstam
Can not reproduce.
Give me steps to reproduce the issue (minimal modlist, new CISE config files) and I will have a look.

I will link the savefile later

I have no idea either of what the hell happened but it's not going away.

Material filter is doing something wacky, and that author won't update his mod soon. Idk

__https://www.mediafire.com/folder/vmt9gbpbu8n8p/Red+errors+Caravan+mod+with+Material+filter

And don't worry. There is no virus.

@Rovstam
I can not reproduce it with MaterialFilter + CaravanItemSelection + yourConfigFile.
The save file you sent has about 100 mods loaded.
I will not download 100 mods to test your savefile, sorry.

So if you do not give me a way to reproduce the issue with a MINIMAL MODLIST (means mods related to the issue + dependencies), I can not help you.

Besides I think the issue might be more on the Material Filter side, so even if you provide a proper way to reproduce the errors, I might not be able to fix it.

Edit:
Since MaterialFilter is not updated to 1.6, there is a chance that is causing your issue.

Yeah

It's 100 qol mods. Weights about 2mb in total. Idk what's the issue.

Exception filling window for CaravanItemSelectionEnhanced.Dialog_TabSettings: System.NullReferenceException: Object reference not set to an instance of an object
[Ref F5AD647E]
at Verse.Listing_TreeThingFilter.ListCategoryChildren (Verse.TreeNode_ThingCategory node, System.Int32 openMask, Verse.Map map, UnityEngine.Rect visibleRect) [0x0000a] in <24d25868955f4df08b02c73b55f389fe>:0
at Verse.ThingFilterUI.DoThingFilterConfigWindow (UnityEngine.Rect rect, Verse.ThingFilterUI+UIState state, Verse.ThingFilter filter, Verse.ThingFilter parentFilter, System.Int32 openMask, System.Collections.Generic.IEnumerable`1[T] forceHiddenDefs, System.Collections.Generic.IEnumerable`1[T] forceHiddenFilters, System.Boolean forceHideHitPointsConfig, System.Boolean forceHideQualityConfig, System.Boolean showMentalBreakChanceRange, System.Collections.Generic.List`1[T] suppressSmallVolumeTags, Verse.Map map) [0x00325] in <24d25868955f4df08b02c73b55f389fe>:0
- PREFIX KamiKatze.MaterialFilter: Void MaterialFilter.ThingFilterUI_DoThingFilterConfigWindow_Patch:addHiddenFilters(IEnumerable`1& forceHiddenFilters)
at CaravanItemSelectionEnhanced.Dialog_TabSettings.DoWindowContents (UnityEngine.Rect wrect) [0x0026d] in <8e4a97c7318641299c2e1cfb0556f319>:0
at Verse.Window.InnerWindowOnGUI (System.Int32 x) [0x001a6] in <24d25868955f4df08b02c73b55f389fe>:0
UnityEngine.StackTraceUtility:ExtractStackTrace ()
Verse.Log:Error (string)
Verse.Window:InnerWindowOnGUI (int)
UnityEngine.GUI:CallWindowDelegate (UnityEngine.GUI/WindowFunction,int,int,UnityEngine.GUISkin,int,single,single,UnityEngine.GUIStyle)